A CASE OF TRUE HERMAPHRODITISM IN THE FOWL 197 



TABLE 2—Conti>med 



CHARACTER 



AS INDICATED BY: 



c. ZZ or ZW 



Castrated individuals of both sexes have 



spurs 

 Male plumage develops on castrates of both 



sexes 



cf Spurs 



cf Plumage 



Certain phases of behavior seen, e.g., in brooding capons 



^ Exceptions are seen in ci'owing hens; but these have been only superficially 

 studied. 



2 Too little is known concerning the deposition of fat in the body of fowl to 

 draw definite conclusions. The altered metabolism of castrates complicates the 

 situation (Meisenheimer, '11, and Pezard, '18). 



' Sebright males, possessing large combs and wattles, have luteal cells in the 

 ovary; but here the female combs and wattles may be covered up by the larger 

 male combs and wattles, due to testicular hormones. 



* There are some genetic differences here, for after castration the primary 

 coverts enlarge in the male, not at all in the female; feminized males do not 

 always develop female feather colors. 



LITERATURE CITED 

 (All of the following papers have been consulted by the writers) 



Berthold, Prof. 1849 Transplantation derHoden. Miiller's Archiv, S. 42, 



BiEDL, A. 1913 Innere Sekretion. Berlin. 



Bond, C. J. 1913 Some points of genetic interest in regeneration of the testes 

 after experimental orchectomy in birds. Journ. of Genetics, vol. 3, 

 pp. 131-139. 



1914 On a case of unilateral development of secondary male charac- 

 ters in a pheasant, with remarks on the influence of hormones in 

 the production of secondary sex characters. Journ. of Genetics, 

 vol. 3, pp. 205-216. (See also brief account in Nature, 1913, p. 338.) 



Brandt, Alex. 1889 Anatomisches und Allegemeines iiber die sogenannte 

 Hahnenfedrigkeit und iiber anderweitige Geschlechtsanomalien bei 

 Vogeln. Zeitsch. f. wiss. Zool., Bd. 48, S. 101-190. 



Boeing, Alice M. 1912 Sex studies. III. The interstitial cells and the 

 supposed internal secretion of the chicken testes. Biol. Bull., vol. 23; 

 pp. 141-153. 



Boring, A. M., and Morgan, T. H. 1918 Lutear cells and hen-feathering, 

 Journ. of Gen. Physiol., vol. 1, pp. 127-131. 



Boring, A. M., and Pearl, R. 1917 Sex studies. IX. Interstitial cells in the 

 reproductive organs of the chicken. Anat. Rec, vol. 13, pp. 233-252. 

 1918 Sex studies. XI. Hermaphroditic birds. Jour. Exp. Zool., vol. 

 25, pp. 1-48. 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL 36, NO 2 



